George ii



v GEORGE H. OGILVY,

PROJE i ATENT FFlcEo OF NEW YORK,N. Y.

CTILQE.

SPECIFICATION forming part of Letters Patent No. 414,989, dated November 12, 1889.

Application filed June 29, 1889.

To all whom, may concrn:

'Be' it known that I, GEORGE 1-I.'OGILVY, residing at New York, in the county of New York and State of New York, have invented certain new and useful Im provementsiu Projectiles, of which the following is a specifica-' tion, reference being had therein to the aceonpanying drawings.

This -invention relates to projectiles for rifled and smooth-bore guns.

The object of the invention is to produce a projectile which will remain point on when fired from a rified or snooth-bore gun and which shall have little atmospheric resistance durim its fiight i i E Figurerl is a Side elevatiou of theprojeotile without the self-rifling groove orgrooves. Fig. 2 is a similar elevation of a grooved projectile. Fig. 3 is a central longitudinal sec-' tion of a shell made after my invention.

The projectile A is at least three calibers in length. The front of, the project-ile for `a distance of one calibeconsists of a cylindrical body portion a, with the front corners b 'ounded-that is, the front portion of the projectile would be a cylinder of a length equal to its diameter but for the rounding of the point, as illustrated. v To the rear of the cylinder the pro' otile tapers in a true conec for at least two-`calibers, 'terminating in a point d at the rear. Of course slight departures may be made from these proportions; but the rule is as above stated.

The cylindrical portion of the projectile may be banded' or otherwise prepared in any usual Inanner to take the rifiing of -a rified gun.. The conic'al rear *portion should have deep spiral grooves e. These grooves begin' in the'cylindrical part,` a and lead nearly to the rear point of the projectile. These grooves have a pitch in the direction of the rifling, and in rifled guns tend to assist in maintaining the rotary notion. Fired from a Smoothbore the grooves will give a rotary notion to Serial No( 316,o83. (No model.)

When theprojectile is used as a shell, the

chambered, as at f, the front or oylindrical This tends to throw the center of gravity well forward. The chamber will follow the general Outline of the conical rear part, so that the wall of the cone will be of about an even thickness. the front, and may be any usual fuse.

\Vith a projectile of this form, conposed ?of any heavy metal, the center of gravity is maintained well forward. The lines for flow of the air are good, and great strength is *had at the front or striking-pont.

Projeutiles havebecn made with a taporto the rear,'but not, so far as I an aware, in the form here presented. The oonical rear portion has been shorter, and \"vas a f rustun and not a true cone.

What I ,claim is 1. A projectile having a eylind-'ical front portion slightly roundcd at the head and a conicalrear portion atvleast twice as long as the cylindrical body, the cone terminatingin a point atthe rear, substantially as described.

2. A projectile `having a cylindrical front portion .slightly rounded at the head and a true cone of at least twice the length of the cylinder in the rear of said cylinder, said -.co11ical portion provided with external spiral grooves, substantially as described.

tion grooved, as described, and chambered, as described, so as to have walls of` practically uniform thickness, and a eylindrical front :ii'y signature in lVitnesses: ROBERT OGILVY,

theprojectile in nanner wellknown GEORGE W. OAKLEY.

part of the projectile remaining nearly solid.

body portion rounded at the head, which is conical rear portion of the projectile will be The fuse h may be inserted froni 3. A projectile having a oonical* rear por- 

